/*  清除默认样式*/
html, body, div, span,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a,
b, u, i, 
dl, dt, dd, ol, ul, li,
fieldset, form, label, 
table, caption, tbody, tfoot, thead, tr, th, td {
  margin: 0;
  padding: 0;
  border: 0;
}
 
ol, ul {
  list-style: none;
}
/* 去掉a默认的下划线 */
a{
    text-decoration: none;
}

